EP 0680152 A2 19951102 - Dynamic compression-rate selection arrangement.
Title (en)
Dynamic compression-rate selection arrangement.
Title (de)
Vorrichtung zur dynamischen Auswahl eines Komprimierungsgrades.
Title (fr)
Dispositif de sélection dynamique du taux de compression.
Publication
Application
Priority
US 23349594 A 19940426
Abstract (en)
A signal compression-selection arrangement (19) dynamically trades off signal storage capacity against signal quality, by sacrificing capacity in favor of signal quality whenever capacity is plentiful and sacrificing quality in favor of capacity whenever capacity is scarce. In a messaging system (FIG. 1), the arrangement monitors the amount of storage (14, 15) that is presently free and available for storing new messages, either on a system-wide or per-mailbox basis, and automatically selects a higher compression rate (13) than a presently-applied compression rate (13) to be applied to newly-received messages as the amount of free storage falls below each predetermined threshold. Storage capacity may be freed up by re-compressing (FIG. 3) at the new, higher, compression rate those stored messages that were previously compressed at a lower compression rate.
IPC 1-7
IPC 8 full level
H04N 5/907 (2006.01); G06F 13/00 (2006.01); G06T 9/00 (2006.01); H03M 7/30 (2006.01); H04L 12/58 (2006.01); H04L 23/00 (2006.01); H04M 1/65 (2006.01); H04M 3/533 (2006.01); H04N 5/92 (2006.01); H04N 7/26 (2006.01); H04N 7/50 (2006.01)
CPC (source: EP US)
H03M 7/30 (2013.01 - EP US); H04M 1/6505 (2013.01 - EP US); H04M 3/533 (2013.01 - EP US); H04N 19/115 (2014.11 - EP US); H04N 19/152 (2014.11 - EP US); H04N 19/184 (2014.11 - EP US); H04N 19/61 (2014.11 - EP US); H04N 19/146 (2014.11 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0680152 A2 19951102; EP 0680152 A3 19960807; AU 1654895 A 19951102; AU 683990 B2 19971127; CA 2141901 A1 19951027; CA 2141901 C 19990907; JP 3231975 B2 20011126; JP H07321850 A 19951208; US 5506872 A 19960409
DOCDB simple family (application)
EP 95302575 A 19950419; AU 1654895 A 19950420; CA 2141901 A 19950206; JP 12041895 A 19950424; US 23349594 A 19940426